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diff --git a/vendor/phpunit/phpunit/src/Util/PHP/Windows.php b/vendor/phpunit/phpunit/src/Util/PHP/Windows.php
new file mode 100644
index 000000000..6587aae85
--- /dev/null
+++ b/vendor/phpunit/phpunit/src/Util/PHP/Windows.php
@@ -0,0 +1,106 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use SebastianBergmann\Environment\Runtime;
+
+/**
+ * Windows utility for PHP sub-processes.
+ *
+ * @since Class available since Release 3.5.12
+ */
+class PHPUnit_Util_PHP_Windows extends PHPUnit_Util_PHP_Default
+{
+    /**
+     * @var string
+     */
+    private $tempFile;
+
+    /**
+     * {@inheritdoc}
+     *
+     * Reading from STDOUT or STDERR hangs forever on Windows if the output is
+     * too large.
+     *
+     * @see https://bugs.php.net/bug.php?id=51800
+     */
+    public function runJob($job, array $settings = array())
+    {
+        $runtime = new Runtime;
+
+        if (false === $stdout_handle = tmpfile()) {
+            throw new PHPUnit_Framework_Exception(
+                'A temporary file could not be created; verify that your TEMP environment variable is writable'
+            );
+        }
+
+        $process = proc_open(
+            $runtime->getBinary() . $this->settingsToParameters($settings),
+            array(
+            0 => array('pipe', 'r'),
+            1 => $stdout_handle,
+            2 => array('pipe', 'w')
+            ),
+            $pipes
+        );
+
+        if (!is_resource($process)) {
+            throw new PHPUnit_Framework_Exception(
+                'Unable to spawn worker process'
+            );
+        }
+
+        $this->process($pipes[0], $job);
+        fclose($pipes[0]);
+
+        $stderr = stream_get_contents($pipes[2]);
+        fclose($pipes[2]);
+
+        proc_close($process);
+
+        rewind($stdout_handle);
+        $stdout = stream_get_contents($stdout_handle);
+        fclose($stdout_handle);
+
+        $this->cleanup();
+
+        return array('stdout' => $stdout, 'stderr' => $stderr);
+    }
+
+    /**
+     * @param resource $pipe
+     * @param string   $job
+     *
+     * @throws PHPUnit_Framework_Exception
+     *
+     * @since  Method available since Release 3.5.12
+     */
+    protected function process($pipe, $job)
+    {
+        if (!($this->tempFile = tempnam(sys_get_temp_dir(), 'PHPUnit')) ||
+            file_put_contents($this->tempFile, $job) === false) {
+            throw new PHPUnit_Framework_Exception(
+                'Unable to write temporary file'
+            );
+        }
+
+        fwrite(
+            $pipe,
+            '<?php require_once ' . var_export($this->tempFile, true) .  '; ?>'
+        );
+    }
+
+    /**
+     * @since Method available since Release 3.5.12
+     */
+    protected function cleanup()
+    {
+        unlink($this->tempFile);
+    }
+}